Formal Short Book Ghostwriting

I have a complete concept in mind and need a skilled ghostwriter to turn it into a polished manuscript of no more than 20,000 words. The entire book must read with a consistently formal tone—think clear, authoritative, and refined rather than conversational or humorous... (Budget: $30 - $250 USD, Jobs: AI Content Writing, Book Writing, Creative Writing, eBooks, Editing, Non-Fiction Writing, Proofreading, Writing Tutoring)